How do I control the mesh extrusion?
You mesh does not appear to be a major time investment thus I suggest


Delete the mesh.  This may delete a one time mistake.
Create a new mesh
Fresh Start
Try to work with the new mesh


Deleting defective work that has a low time investment and creating a new work can save time.  If you have the same defect many times in a row and you report this then we need a different approach.